Repairs are being carried out to the grade two listed building after Cumbria experienced the second wettest year on record in 2012.
It was initially thought that the repairs would be minor, however after closer inspection it was clear there were serious issues regarding the state of the windows and ceilings.
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The arrests come weeks after a much-publicised series of appeals to mark the 30th anniversary of the 18-year-old's death.
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